Gurobi 5.0.1 (linux64) logging started Sun Nov 18 02:50:06 2012 Optimize a model with 407 rows, 268 columns and 1283 nonzeros Presolve time: 0.00s Presolved: 407 rows, 268 columns, 1283 nonzeros Variable types: 0 continuous, 268 integer (268 binary) Found heuristic solution: objective 82.0000000 Root relaxation: objective 0.000000e+00, 99 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 65 82.00000 0.00000 100% - 0s H 0 0 78.0000000 0.00000 100% - 0s H 0 0 76.0000000 0.00000 100% - 0s 0 0 0.57538 0 67 76.00000 0.57538 99.2% - 0s 0 0 0.74462 0 67 76.00000 0.74462 99.0% - 0s 0 0 0.75504 0 69 76.00000 0.75504 99.0% - 0s 0 0 0.75590 0 67 76.00000 0.75590 99.0% - 0s 0 0 0.76331 0 72 76.00000 0.76331 99.0% - 0s 0 0 0.77706 0 70 76.00000 0.77706 99.0% - 0s 0 0 0.81044 0 81 76.00000 0.81044 98.9% - 0s 0 0 0.83422 0 82 76.00000 0.83422 98.9% - 0s 0 0 0.84615 0 67 76.00000 0.84615 98.9% - 0s 0 0 0.85744 0 67 76.00000 0.85744 98.9% - 0s 0 0 0.86490 0 82 76.00000 0.86490 98.9% - 0s 0 0 0.86872 0 67 76.00000 0.86872 98.9% - 0s 0 0 0.86872 0 67 76.00000 0.86872 98.9% - 0s 0 0 0.86872 0 67 76.00000 0.86872 98.9% - 0s 0 2 0.88693 0 67 76.00000 0.88693 98.8% - 0s * 44 44 25 66.0000000 5.92308 91.0% 31.0 0s * 46 40 27 65.0000000 5.92308 90.9% 30.0 0s * 93 80 27 64.0000000 5.97498 90.7% 26.2 0s * 94 78 26 63.0000000 5.97498 90.5% 25.9 0s * 96 77 27 61.0000000 5.97498 90.2% 25.7 0s * 204 163 30 60.0000000 12.03333 79.9% 23.7 0s * 207 161 30 59.0000000 12.03333 79.6% 23.5 0s * 311 229 25 56.0000000 16.20000 71.1% 24.0 0s * 387 253 20 55.0000000 17.00000 69.1% 23.1 0s * 390 243 20 54.0000000 17.00000 68.5% 23.0 0s * 645 360 34 53.0000000 21.33333 59.7% 23.4 0s * 2949 794 32 52.0000000 29.50000 43.3% 26.5 3s 4581 1076 42.37255 24 128 52.00000 32.50000 37.5% 25.8 5s 10426 1618 50.21277 27 132 52.00000 38.60000 25.8% 24.2 10s 17376 1623 cutoff 28 52.00000 41.69231 19.8% 23.1 15s 25262 955 50.52083 27 135 52.00000 44.44444 14.5% 22.4 20s Explored 28798 nodes (635291 simplex iterations) in 22.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%